CUVE Waters


  • Good quality rainwater is available during the dry season for gardening and cooking.
  • Construction and operation of rainwater harvesting facilities in Namibia is possible.
  • Cost-benefit and sustainability analyses showed that on the household level, ferrocement tanks, and on the communal level, greenhouses with ponds are the most appropriate options.
  • Knowledge about construction, agriculture and irrigation has been further developed.
  • Income generation by selling crops varied. Possible income for a household is up to N$ 12,000 per year. 
  • Diet and health situation of families have improved. 
  • Jobs have been created as further plants have been built in the region by people trained during the project.


All costs have been calculated for the pilot case. For different reasons investments as well as running costs can be much lower if a roll-out of the technology is achieved.

Individual/household approach

  • Total investment: from N$ 12,000 to 18,000, additional costs for the garden: approx. N$ 2,700
  • Operation and maintenance: N$ 100 per year for maintenance of infrastructure (e.g. tanks, gutters) and N$ 500 per year for the drip irrigation system as well as other running costs for the garden (e. g. seeds, fertilizers and pesticides)

Communal approach

  • Total investment: approx. N$ 115,000 for the tanks, ponds and the ground catchment, additional N$ 40,000 for the garden including greenhouse and drip irrigation system
  • Operation and maintenance: about N$ 1,000 per year for maintenance of infrastructure (e.g. tanks, fences)  and N$ 2,000 per year running costs for the garden (e.g. seeds, fertilizers and pesticides)

Technical data

Household rooftop systemsStorage capacity [m³]Gardening area

2 ferrocement tanks

1 brick tank

1 polyethylene tank


150 m² open garden at each tank 

Green villageStorage capacity [m³]Gardening area

Green village (total)

Underground tank





160 m² greenhouse and 

900 m² open garden